How do you garden for gorillas? David meets the man who was in charge of planting at Dublin Zoo for four decades. Stephen Butler explains how the plants enhance the environment for the animals and give a sense of their natural habitat. At Ballywalter, Anna Hudson is building walls out of logs – an attractive feature in any garden and great for wild life. In Greyabbey, on the Ards Peninsula, there is a secret garden called Greba – David meets up with owners Richard and Beverley to find out how they have transformed a disused quarry into a place of beauty. In studio Claire McNally and Mary Doris answer questions and have some gardening related ideas for Mothers’ day. Email the programme on gardenerscorner@bbc.co.uk